Mini Split Installation in Morristown, TN
A new system here will heat from October through April and cool from May through September every year. Tell us about the house, and a licensed contractor who covers Hamblen County will get in touch.
Tell us about the job
It takes about a minute.
What a mini-split in Morristown has to handle
Your mini-split will run almost every month of the year here. Homes in Hamblen County need heat from October through April and cooling from May through September, so the system gets little rest. Winter nights average 30°F through December, January, and February, and summer afternoons average 86°F, which means the heat pump has to work both sides, pulling warmth out of cold air and pulling heat out of hot air.
Most homes here heat with electricity, so when the power goes out, so does the heat. Hamblen County has seen 19 winter storms and 59 damaging wind events over the past ten years, and statewide, one in five households lost power for at least a day in 2024. A new mini-split installed on or after January 1, 2023 has to meet 14.3 SEER2 for cooling and 7.5 HSPF2 for heating, the federal minimum for split-system heat pumps.
- 7 months
- October through April, your system heats
- 5 months
- May through September, it cools
- 30°F
- the average winter night it heats against
- 86°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
- Is a mini split worth it?
- For most homes, yes, especially if you're heating or cooling a room your main system doesn't reach well. Morristown homes need either heat or cooling every month of the year, so a system that handles both jobs earns its keep. A mini split runs on electricity, which already powers most homes here, and it gives you room-by-room control instead of running the whole house's system for one space. Whether it makes sense for your situation depends on what you already have, and a contractor can walk through that with you.
- How many rooms can a mini split cover?
- A single outdoor unit can run one indoor head, or several with a multi-zone system. Each indoor head is sized for the room it serves, so covering more rooms means adding more heads, not stretching one unit further than it should go. A contractor sizes the system to your rooms, since a unit too small for the space won't keep up on the coldest nights, and one too large will cycle on and off more than it should.
- Can a mini split heat a whole house?
- It can, if the system is sized and placed for that. Multi-zone mini splits run several indoor heads off one outdoor unit, with each head warming the room it's mounted in, and that can cover a whole house even with winter lows averaging 30 degrees here from December through February. What decides whether it works for your house is room layout and how much heat each room loses, which is why a contractor needs to look at the house before sizing the system.